Bulgarian men dance in the icy waters of the Tundzha river during a celebration to commemorate Epiphany Day in the town of Kalofer January 6, 2015. It is believed that the ritual will bring good health to the participants throughout the new year. (Photo by Stoyan Nenov/Reuters)

Bulgarian men dance in the icy waters of the Tundzha river during a celebration to commemorate Epiphany Day in the town of Kalofer January 6, 2015. (Photo by Stoyan Nenov/Reuters)

Bulgarian men dance and sing in the icy waters of the Tundzha river during a celebration to commemorate Epiphany Day in the town of Kalofer January 6, 2015. (Photo by Stoyan Nenov/Reuters)

Bulgarian men dance and sing in the icy waters of the Tundzha river during a celebration to commemorate Epiphany Day in the town of Kalofer January 6, 2015. (Photo by Stoyan Nenov/Reuters)

A Bulgarian man breaks the ice as he wades in the icy waters of the Tundzha river, in front of others who are dancing and singing during a celebration to commemorate Epiphany Day in the town of Kalofer January 6, 2015. (Photo by Stoyan Nenov/Reuters)

A Bulgarian man wades in the icy waters of the Tundzha river, in front of others who are dancing and singing during a celebration to commemorate Epiphany Day in the town of Kalofer January 6, 2015. (Photo by Stoyan Nenov/Reuters)

Believers sing and dance in the icy water of the river Tundzha as they celebrate Epiphany day, a Christian festival, in the town of Kalofer, Bulgaria, Tuesday, January 6, 2015. Traditionally, an Eastern Orthodox priest throws a cross in the river and it is believed that the one who retrieves it will be healthy through the year. In the central Bulgarian town of Kalofer, hundreds of Christians marked Epiphany by donning national costumes and wading into the frigid waters of the Tundzha river. (Photo by Valentina Petrova/AP Photo)

Bulgarian men dance in the icy waters of the Tundzha river during a celebration to commemorate Epiphany Day in the town of Kalofer January 6, 2015. (Photo by Stoyan Nenov/Reuters)

Musicians play bagpipes and drums during ritual in the icy water of the river Tundzha as they celebrate Epiphany day, a Christian festival, in the town of Kalofer, Bulgaria, Tuesday, January 6, 2015. (Photo by Valentina Petrova/AP Photo)